A lot of small kids got similar attention problems at small age like 4 or 5. As far as I observe, the problem is particularly more severe in boys than girls. However, the problem will be much more improved when they grow older.
I heard from my son's teacher that boys at this age have an attention span of only 10 to 15 minutes. Beyond this span, they will lose interest in a certain task and will move to another one.
According to the specialist, the child in K1 age group can only focus 11 minutes consecutively in maximum. You may ask the teacher under what circumstance she drew this conclusion.